#!/usr/bin/env python3
# -*- coding=utf-8 -*-
# 题目：时间函数举例2。


def f1():
    import time

    start = time.time()
    for i in range(3000):
        print(i)
    end = time.time()

    print(end - start)


f = f1
if __name__ == "__main__":
    f()
